Taken from that National Motorists Association.
Q. Isn't slower always safer?
A. No, federal and state studies have consistently shown that the drivers most likely to get into accidents in traffic are those traveling significantly below the average speed. According to an Institute of Transportation Engineers Study, those driving 10 mph slower than the prevailing speed are six times as likely to be involved in an accident. That means that if the average speed on an interstate is 70 mph, the person traveling at 60 mph is far more likely to be involved in an accident than someone going 70 or even 80 mph.
Q. Aren't most traffic accidents caused by speeding?
A. No, the National Highway Traffic Safety Administration (NHTSA) claims that 30 percent of all fatal accidents are "speed related," but even this is misleading. This means that in less than a third of the cases, one of the drivers involved in the accident was "assumed" to be exceeding the posted limit. It does not mean that speeding caused the accident. Research conducted by the Florida Department of Transportation showed that the percentage of accidents actually caused by speeding is very low, 2.2 percent.
Maybe do some research before guessing and using fallacies.